Hugh Hefner really has his hands full now – he’s taken on seven new girlfriends at once, one for every day of the week!

And the 75-year-old founder of Playboy magazine boasts that with a little help from Viagra, he doesn’t even need to take turns with them in the sack – he’s been enjoying eight-in-a-bed sex sessions for the past four months.

His new harem includes Tiffany, Stephanie, Cathi, Katie, Buffy, Tina and Regina – all aged 19 to 28 – says the pipe-puffing publisher in the March issue of Vanity Fair.

“Who gets more and what kind of attention all depends on the girl – and now, with Viagra, you don’t have to worry,” he says.

But there is one big problem with his sexy seven, who include women young enough to be his great-granddaughters.

“The girls don’t even know half the time who Chaplin or Bogart is . . . Regina, who has just joined us here in the last few weeks, uh, saw her very first black-and-white movie the other night,” he says.

Hef stunned the world two years ago when he told of romping with four girlfriends at once: Sandy, Mandy, Brande and Jessica.

That eye-popping situation ended last August, when all four moved out, and it was “the kind of thing where you don’t know how much you’ll miss something until it’s gone,” Hef says.

But now with his seven new babes, everything is A-OK again, he crows.

The aging sex-mag czar also says young women today are much more healthy and open about sex because they pay less attention to what the church says.

“Sex used to be . . . codified and controlled by church and state. But good girls like sex, too – and that’s the key,” Hefner tells Vanity Fair.

“Women today are much more natural and less worried about what sex means.”

The old notion that a man should “be with the bad girls before you get married and then marry a good girl . . . is so hurtful and so totally inappropriate for women,” he explains.

Hef also admits his constant need for beautiful women may have been the result of a childhood without enough love.

“Parenthood is not a natural thing to me, and it wasn’t to my parents, and I think you pass that on to some extent,” he explains.

He says his mom never hugged or kissed him because she thought it would “spread germs. And so I was always looking for that love denied me in my early childhood.”

As to whether Hef, who lives at the famed Playboy Mansion in Los Angeles, has anything else on his sexual wish list – it doesn’t sound like it.

“I’ve done it all – not including livestock,” the elderly sex guru boasts.